User Manual

Hardware UM2042
12/25 DocID029132 Rev 2
Figure 6. ST25R3911B schematics
1 1
2 2
3 3
4 4
D D
C C B B
A A
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6B1
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A4 ST25R3911B-DISCO
MDG NFC & Reader Competence Center
GND
GND
GND
GND
CSO CSI
TRIM1_0 TRIM1_1 TRIM1_2 TRIM1_3 TRIM2_0 TRIM2_1 TRIM2_2 TRIM2_3 RFO1 RFO2 RFI1 RFI2
SEN_11 MISO_11 MOSI_11 SCLK_11 INTR_11
VSP_RF
VSP_RF
J301
C303 d.n.p.
GND
CSO_out
GND GND
GNDGND
GND
1
GND
3
2
P301 d.n.p.
GND
1
GND
3
2
P302 d.n.p.
V_RF_3911
RFI1 RFI2 RFO1 RFO2 TRIM1_0 TRIM1_1 TRIM1_2 TRIM1_3 TRIM2_0 TRIM2_1 TRIM2_2 TRIM2_3
Antenna_Con
Antenna_Con
TRIM2_0 TRIM2_1 TRIM2_2 TRIM2_3 TRIM1_0 TRIM1_1 TRIM1_2 TRIM1_3 RFO1 RFO2 RFI2 RFI1
INTR_11 MISO_11 MOSI_11 SCLK_11 SEN_11
ST25R3911 NFC Initiator / HF Reader
Controller Interface Antenna Connection
VSP_A
VSP_D
AGD
V_RF
GNDGND
GND
SEN INTR MISO MOSI SCLK V_RF 3_3V MCU_CLK
SPI/Power_Con
3V3
JP301 d.n.p.
J303
open
J302
d.n.p.
GND
V_RF
3V3
C302
C_100n_0402_X7R
C301 C_1μ_0402_X5R
C304
C_100n_0402_X7R
Y301
C308 C_8p2_0402
C307 C_8p2_0402
C309
C_10n_0402_X7R
C310
C_10n_0402_X7R
C311
C_10n_0402_X7R
C312
C_10n_0402_X7R
C313
C_2μ2_0402_X5R
C314
C_2μ2_0402_X5R
C315
C_2μ2_0402_X5R
C316
C_1μ_0402_X5R
R306
C305
C_12p_0402
R307
C306
C_12p_0402
CSI_out
GND
R301
R302
R303
R304
R305
SPI/Power_Con
L301 FB_0603
V_RF_3911
ST25R3911
VDD_IO
1
CSO
2
VSP_D
3
XTO
4
XTI
5
VSN_D
6
VSP_RF
9
RFO1
10
RFO2
11
VSN_RF
12
TRIM1_3
13
TRIM2_3
14
TRIM1_0
19
TRIM2_0
20
VSS
21
RFI1
22
RFI2
23
AGD
24
IRQ
27
MCU_CLK
28
MISO
29
MOSI
30
SCLK
31
/SS
32
VSP_A
7
VDD
8
TRIM1_2
15
TRIM2_2
16
TRIM1_1
17
TRIM2_1
18
CSI
25
VSN_A
26
EP VSUB
33
NFC Initiator / HF Reader IC
U301 ST25R3911B